1. Real Kramer

Cosmo Kramer was based on creator Larry David's real neighbor, Kenny Kramer. He even lived right across the hall just like the show. They paid him off a little bit to use his name and he even auditioned to get the role of Kramer on the show himself. Obviously he didn't land the part, but he's now giving "Kramer's Reality Tours" in New York City.

2. The Soup Nazi

Actor Larry Thomas played the character and still travels the world making appearances as The Soup Nazi. The craziest part is he was only featured in one episode and made a small cameo in the finale.

3. J. Peterman

Elaine's boss J. Peterman, played by John O'Hurley, was inspired by a real guy named John Peterman who has a catalog company that's very much like the one the character runs on the show. You can still go to the website jpeterman.com and order goods.

4. Elain’s Famous Dance

Her dance was inspired by SNL creator Lorne Michaels. A former employee of his wrote the TV icon's dance into an episode.

5. Festivus

Many people actually celebrate this holiday on Dec. 23. It’s recognized by the state of Florida and you can buy your own gear online. HAPPY FESTIVUS!

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